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Air Toxics Program

IDEM Air Toxics > Monitoring > Air Toxics Monitor Siting Air Toxics Monitor Siting

IDEM evaluates many urban areas throughout Indiana in order to select the regions to be monitored as part of the ToxWatch network. Urban areas were selected based primarily on population density and presence of industry. Dense populations also result in increased motor vehicle emissions.

Once the area of a city has been selected in which to locate a monitor, possible sites in the area are surveyed for their acceptability as monitoring locations. Specific siting criteria for ToxWatch monitoring locations include:

  • unobstructed air flow,
  • a sampling height of 2 to 15 meters above ground level (the breathing zone),
  • security,
  • accessibility by operators,
  • the amount of site preparation necessary,
  • the availability of other sites in the area, and
  • environmental justice considerations.

Historic Monitoring Locations

Below is a chart showing all the historic ToxWatch monitoring locations and when they were sampled. No new monitors have been added to the ToxWatch network since 2008.


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Current Monitoring Locations

East Chicago

The East Chicago Air Toxics Monitor (also known as the East Chicago – Aldis St. monitor) is located at the Water Filtration Plant, 3330 Aldis St., East Chicago, IN 46312. It has been monitoring air toxics concentrations from 1999 through the present day. The East Chicago – Aldis St. monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the county. Large emitters of air toxics within Lake County include the U.S. Gary Works facility, the State Line Generating Plant and the BP Products Whiting Facility.

Gary

The Gary Air Toxics Monitor (also known as the Gary IITRI monitor) is located at the IITRI Bunker, 201 Mississippi St., Gary, IN 46402. It has been monitoring air toxics concentrations from 1999 through the present day. The Gary – IITRI monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation. Large emitters of air toxics within Lake County include the U.S. Gary Works facility, the State Line Generating Plant and the BP Products Whiting Facility.

Hammond

The Hammond Air Toxics Monitor (also known as the Hammond – 141st St. monitor or the Hammond CAAP monitor) is located at 1300 E. 141st St., Hammond, IN 46327. It has been monitoring air toxics concentrations from 1998 through the present day. The Hammond CAAP monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation. Large emitters of air toxics within Lake County include the U.S. Gary Works facility, the State Line Generating Plant and the BP Products Whiting Facility.

Whiting

The Whiting Air Toxics Monitor (also known as the Whiting – HS monitor or the Whiting High School monitor) is located at 1751 Oliver St., Whiting, IN 46394. It has been monitoring air toxics concentrations from 2004 through the present day. The Whiting High School monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation. Large emitters of air toxics within Lake County include the U.S. Gary Works facility, the State Line Generating Plant and the BP Products Whiting Facility.

Ogden Dunes

The Ogden Dunes Air Toxics Monitor (also know as the OD - Diana Rd monitor) is located at the Water Treatment Plant, 84 Diana Rd., Ogden Dunes, IN 46368. It has been monitoring air toxics concentrations from 1998 through the present day. The Ogden Dunes monitor is located in the northwestern portion of the state in Porter County. This area of Indiana is one of the most heavily industrialized areas of the nation. Large emitters of air toxics within Porter County include ISG Burns Harbor Plant, U.S. Steel Corporations Midwest Plant, and the Bailey Electric Generating Station.

Indianapolis

The Indianapolis Air Toxics Monitor (also known as the Indianapolis – Washington Park monitor, George Washington Park monitor, or just Washington Park monitor) is located in George Washington Park, 3120 E. 30th St., Indianapolis, IN 46218. It has been monitoring air toxics concentrations from 1999 through the present day. The Washington Park monitor is located in the center portion of the state in Marion County. Large emitters of air toxics within Marion County include the IPL Harding Street Electric Generating Station, the Citizens Gas & Coke Utility plant, and the Engineered Polymer Solutions facility.

Evansville

The Evansville Air Toxics Monitor (also known as the Evansville – U of E monitor or the University of Evansville monitor) is located at the Carson Center on the campus of the University of Evansville at 1800 Walnut St., Evansville, IN 47714. It has been monitoring air toxics concentrations from 1999 through the present day. The University of Evansville monitor is located in the southwestern portion of the state in Vanderburgh County. Large emitters of air toxics within Vanderburgh County include the Whirlpool Corporation, Silgan Closures, and the Guardian Automotive Trim facility.

Lafayette

The Lafayette Air Toxics Monitor (also known as the Lafayette – Greenbush St. or Lafayette - Cinergy monitor) is located at the Cinergy Substation, 3401 Greenbush St., Lafayette, IN 47905. It has been monitoring air toxics concentrations from January 2008 through the present day. The Lafayette monitor is located in the west-central portion of the state in Tippecanoe County.

Clarksville

The Clarksville Air Toxics Monitor (also know as the New Albany - Falls of the Ohio monitor) is located at the Falls of the Ohio State Park, 201 W. Riverside Dr. Clarksville, IN 47129. It has been monitoring air toxics concentrations from March 2008 through the present day. The Clarksville monitor is located in the southern portion of the state, on the Ohio River at the southern tip of Clark County.